77440434 has 16 divisors (see below), whose sum is σ = 155323872. Its totient is φ = 25739648.

The previous prime is 77440421. The next prime is 77440459. The reversal of 77440434 is 43404477.

It is a junction number, because it is equal to n+sod(n) for n = 77440395 and 77440404.

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, 16164 + ... + 20399.

It is an arithmetic number, because the mean of its divisors is an integer number (9707742).

Almost surely, 2^77440434 is an apocalyptic number.

77440434 is an abundant number, since it is smaller than the sum of its proper divisors (77883438).

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

77440434 is a wasteful number, since it uses less digits than its factorization.

77440434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36921.

The product of its (nonzero) digits is 37632, while the sum is 33.

The square root of 77440434 is about 8800.0246590564. The cubic root of 77440434 is about 426.2416909713.

It can be divided in two parts, 774 and 40434, that multiplied together give a triangular number (31295916 = T₇₉₁₁).

The spelling of 77440434 in words is "seventy-seven million, four hundred forty thousand, four hundred thirty-four".