77628070 has 64 divisors (see below), whose sum is σ = 158760000. Its totient is φ = 27127296.

The previous prime is 77627989. The next prime is 77628077. The reversal of 77628070 is 7082677.

It is a super-2 number, since 2×77628070² = 12052234503849800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77628077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222256 + ... + 222604.

It is an arithmetic number, because the mean of its divisors is an integer number (2480625).

Almost surely, 2^77628070 is an apocalyptic number.

77628070 is an abundant number, since it is smaller than the sum of its proper divisors (81131930).

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

77628070 is a wasteful number, since it uses less digits than its factorization.

77628070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 77628070 is about 8810.6793154671. The cubic root of 77628070 is about 426.5856705246.

The spelling of 77628070 in words is "seventy-seven million, six hundred twenty-eight thousand, seventy".