70491330 has 256 divisors, whose sum is σ = 245145600. Its totient is φ = 13996800.

The previous prime is 70491329. The next prime is 70491331. The reversal of 70491330 is 3319407.

It is an interprime number because it is at equal distance from previous prime (70491329) and next prime (70491331).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 70491294 and 70491303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70491331) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 466755 + ... + 466905.

It is an arithmetic number, because the mean of its divisors is an integer number (957600).

Almost surely, 2^70491330 is an apocalyptic number.

70491330 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 70491330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122572800).

70491330 is an abundant number, since it is smaller than the sum of its proper divisors (174654270).

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

70491330 is a wasteful number, since it uses less digits than its factorization.

70491330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 70491330 is about 8395.9115050124. The cubic root of 70491330 is about 413.0905261130.

The spelling of 70491330 in words is "seventy million, four hundred ninety-one thousand, three hundred thirty".