77147020 has 24 divisors (see below), whose sum is σ = 171539424. Its totient is φ = 29043456.

The previous prime is 77147017. The next prime is 77147023. The reversal of 77147020 is 2074177.

It is an interprime number because it is at equal distance from previous prime (77147017) and next prime (77147023).

It is a self number, because there is not a number n which added to its sum of digits gives 77147020.

It is not an unprimeable number, because it can be changed into a prime (77147023) 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, 113112 + ... + 113791.

It is an arithmetic number, because the mean of its divisors is an integer number (7147476).

Almost surely, 2^77147020 is an apocalyptic number.

It is an amenable number.

77147020 is an abundant number, since it is smaller than the sum of its proper divisors (94392404).

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

77147020 is a wasteful number, since it uses less digits than its factorization.

77147020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226929 (or 226927 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 77147020 is about 8783.3376344075. The cubic root of 77147020 is about 425.7026807083.

The spelling of 77147020 in words is "seventy-seven million, one hundred forty-seven thousand, twenty".