70621928 has 32 divisors (see below), whose sum is σ = 142955400. Its totient is φ = 32514048.

The previous prime is 70621921. The next prime is 70621951. The reversal of 70621928 is 82912607.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 36024004 + 34597924 = 6002^2 + 5882^2 .

It is not an unprimeable number, because it can be changed into a prime (70621921) 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, 69488 + ... + 70496.

Almost surely, 2^70621928 is an apocalyptic number.

It is an amenable number.

70621928 is an abundant number, since it is smaller than the sum of its proper divisors (72333472).

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

70621928 is a wasteful number, since it uses less digits than its factorization.

70621928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701 (or 1697 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 70621928 is about 8403.6853820214. The cubic root of 70621928 is about 413.3454771551.

The spelling of 70621928 in words is "seventy million, six hundred twenty-one thousand, nine hundred twenty-eight".