70915730 has 32 divisors (see below), whose sum is σ = 133464240. Its totient is φ = 27095040.

The previous prime is 70915711. The next prime is 70915751. The reversal of 70915730 is 3751907.

It can be written as a sum of positive squares in 8 ways, for example, as 7123561 + 63792169 = 2669^2 + 7987^2 .

It is a super-2 number, since 2×70915730² = 10058081522865800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 26870 + ... + 29390.

Almost surely, 2^70915730 is an apocalyptic number.

70915730 is a deficient number, since it is larger than the sum of its proper divisors (62548510).

70915730 is a wasteful number, since it uses less digits than its factorization.

70915730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654.

The product of its (nonzero) digits is 6615, while the sum is 32.

The square root of 70915730 is about 8421.1477840019. The cubic root of 70915730 is about 413.9178853376.

It can be divided in two parts, 7091 and 5730, that added together give a palindrome (12821).

The spelling of 70915730 in words is "seventy million, nine hundred fifteen thousand, seven hundred thirty".