77023540 has 24 divisors (see below), whose sum is σ = 176454432. Its totient is φ = 28008480.

The previous prime is 77023523. The next prime is 77023567. The reversal of 77023540 is 4532077.

It is a junction number, because it is equal to n+sod(n) for n = 77023499 and 77023508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174834 + ... + 175273.

It is an arithmetic number, because the mean of its divisors is an integer number (7352268).

Almost surely, 2^77023540 is an apocalyptic number.

It is an amenable number.

77023540 is an abundant number, since it is smaller than the sum of its proper divisors (99430892).

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

77023540 is a wasteful number, since it uses less digits than its factorization.

77023540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350127 (or 350125 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 77023540 is about 8776.3056008779. The cubic root of 77023540 is about 425.4754356498.

It can be divided in two parts, 770 and 23540, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 77023540 in words is "seventy-seven million, twenty-three thousand, five hundred forty".