77493870 has 24 divisors (see below), whose sum is σ = 201484296. Its totient is φ = 20665008.

The previous prime is 77493853. The next prime is 77493881. The reversal of 77493870 is 7839477.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430432 + ... + 430611.

It is an arithmetic number, because the mean of its divisors is an integer number (8395179).

Almost surely, 2^77493870 is an apocalyptic number.

77493870 is an abundant number, since it is smaller than the sum of its proper divisors (123990426).

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

77493870 is a wasteful number, since it uses less digits than its factorization.

77493870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861056 (or 861053 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 77493870 is about 8803.0602633402. The cubic root of 77493870 is about 426.3397078728.

The spelling of 77493870 in words is "seventy-seven million, four hundred ninety-three thousand, eight hundred seventy".