70725990 has 16 divisors (see below), whose sum is σ = 169742448. Its totient is φ = 18860256.

The previous prime is 70725971. The next prime is 70725997. The reversal of 70725990 is 9952707.

It is a super-2 number, since 2×70725990² = 10004331322960200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70725997) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1178737 + ... + 1178796.

It is an arithmetic number, because the mean of its divisors is an integer number (10608903).

Almost surely, 2^70725990 is an apocalyptic number.

70725990 is an abundant number, since it is smaller than the sum of its proper divisors (99016458).

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

70725990 is a wasteful number, since it uses less digits than its factorization.

70725990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357543.

The product of its (nonzero) digits is 39690, while the sum is 39.

The square root of 70725990 is about 8409.8745531667. The cubic root of 70725990 is about 413.5484001876.

The spelling of 70725990 in words is "seventy million, seven hundred twenty-five thousand, nine hundred ninety".