77939340 has 24 divisors (see below), whose sum is σ = 218230320. Its totient is φ = 20783808.

The previous prime is 77939333. The next prime is 77939357. The reversal of 77939340 is 4393977.

It is a junction number, because it is equal to n+sod(n) for n = 77939292 and 77939301.

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, 649435 + ... + 649554.

It is an arithmetic number, because the mean of its divisors is an integer number (9092930).

Almost surely, 2^77939340 is an apocalyptic number.

It is an amenable number.

77939340 is an abundant number, since it is smaller than the sum of its proper divisors (140290980).

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

77939340 is a wasteful number, since it uses less digits than its factorization.

77939340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299001 (or 1298999 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 42.

The square root of 77939340 is about 8828.3260021365. The cubic root of 77939340 is about 427.1550789852.

The spelling of 77939340 in words is "seventy-seven million, nine hundred thirty-nine thousand, three hundred forty".