77087340 has 72 divisors (see below), whose sum is σ = 255095568. Its totient is φ = 18687360.

The previous prime is 77087293. The next prime is 77087383. The reversal of 77087340 is 4378077.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 77087295 and 77087304.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17487 + ... + 21446.

It is an arithmetic number, because the mean of its divisors is an integer number (3542994).

Almost surely, 2^77087340 is an apocalyptic number.

It is an amenable number.

77087340 is an abundant number, since it is smaller than the sum of its proper divisors (178008228).

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

77087340 is a wasteful number, since it uses less digits than its factorization.

77087340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38959 (or 38954 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 77087340 is about 8779.9396353278. The cubic root of 77087340 is about 425.5928795778.

The spelling of 77087340 in words is "seventy-seven million, eighty-seven thousand, three hundred forty".