77628039 has 8 divisors (see below), whose sum is σ = 103654512. Its totient is φ = 51676800.

The previous prime is 77627989. The next prime is 77628077. The reversal of 77628039 is 93082677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77628039 - 2⁹ = 77627527 is a prime.

It is a super-2 number, since 2×77628039² = 12052224877971042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77628839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16354 + ... + 20559.

It is an arithmetic number, because the mean of its divisors is an integer number (12956814).

Almost surely, 2^77628039 is an apocalyptic number.

77628039 is a deficient number, since it is larger than the sum of its proper divisors (26026473).

77628039 is a wasteful number, since it uses less digits than its factorization.

77628039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37617.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 77628039 is about 8810.6775562382. The cubic root of 77628039 is about 426.5856137404.

The spelling of 77628039 in words is "seventy-seven million, six hundred twenty-eight thousand, thirty-nine".