70489440 has 432 divisors, whose sum is σ = 298024272. Its totient is φ = 15676416.

The previous prime is 70489423. The next prime is 70489451. The reversal of 70489440 is 4498407.

It is a tau number, because it is divible by the number of its divisors (432).

It is a super-2 number, since 2×70489440² = 9937522303027200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 70489395 and 70489404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1905102 + ... + 1905138.

It is an arithmetic number, because the mean of its divisors is an integer number (689871).

Almost surely, 2^70489440 is an apocalyptic number.

70489440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70489440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149012136).

70489440 is an abundant number, since it is smaller than the sum of its proper divisors (227534832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70489440 is a wasteful number, since it uses less digits than its factorization.

70489440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 70489440 is about 8395.7989494747. The cubic root of 70489440 is about 413.0868341787.

The spelling of 70489440 in words is "seventy million, four hundred eighty-nine thousand, four hundred forty".