70979440 has 120 divisors (see below), whose sum is σ = 202286160. Its totient is φ = 23030784.

The previous prime is 70979423. The next prime is 70979479. The reversal of 70979440 is 4497907.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 70979393 and 70979402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74004 + ... + 74956.

It is an arithmetic number, because the mean of its divisors is an integer number (1685718).

Almost surely, 2^70979440 is an apocalyptic number.

70979440 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 70979440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101143080).

70979440 is an abundant number, since it is smaller than the sum of its proper divisors (131306720).

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

70979440 is a wasteful number, since it uses less digits than its factorization.

70979440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 986 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 70979440 is about 8424.9296732970. The cubic root of 70979440 is about 414.0418015000.

The spelling of 70979440 in words is "seventy million, nine hundred seventy-nine thousand, four hundred forty".