70685440 has 180 divisors, whose sum is σ = 206108784. Its totient is φ = 23181312.

The previous prime is 70685431. The next prime is 70685449. The reversal of 70685440 is 4458607.

It is an interprime number because it is at equal distance from previous prime (70685431) and next prime (70685449).

It is a junction number, because it is equal to n+sod(n) for n = 70685396 and 70685405.

It is not an unprimeable number, because it can be changed into a prime (70685449) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3073269 + ... + 3073291.

Almost surely, 2^70685440 is an apocalyptic number.

70685440 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 70685440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103054392).

70685440 is an abundant number, since it is smaller than the sum of its proper divisors (135423344).

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

70685440 is an frugal number, since it uses more digits than its factorization.

70685440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 70685440 is about 8407.4633510947. The cubic root of 70685440 is about 413.4693505412.

The spelling of 70685440 in words is "seventy million, six hundred eighty-five thousand, four hundred forty".