77940542 has 8 divisors (see below), whose sum is σ = 116980416. Its totient is φ = 38947072.

The previous prime is 77940521. The next prime is 77940547. The reversal of 77940542 is 24504977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 77940496 and 77940505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77940547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7043 + ... + 14334.

It is an arithmetic number, because the mean of its divisors is an integer number (14622552).

Almost surely, 2^77940542 is an apocalyptic number.

77940542 is a deficient number, since it is larger than the sum of its proper divisors (39039874).

77940542 is a wasteful number, since it uses less digits than its factorization.

77940542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23202.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 77940542 is about 8828.3940782002. The cubic root of 77940542 is about 427.1572748714.

The spelling of 77940542 in words is "seventy-seven million, nine hundred forty thousand, five hundred forty-two".