77741972 has 24 divisors (see below), whose sum is σ = 169619520. Its totient is φ = 30288960.

The previous prime is 77741971. The next prime is 77741987. The reversal of 77741972 is 27914777.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77741971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125897 + ... + 126512.

It is an arithmetic number, because the mean of its divisors is an integer number (7067480).

Almost surely, 2^77741972 is an apocalyptic number.

It is an amenable number.

77741972 is an abundant number, since it is smaller than the sum of its proper divisors (91877548).

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

77741972 is a wasteful number, since it uses less digits than its factorization.

77741972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252431 (or 252429 counting only the distinct ones).

The product of its digits is 172872, while the sum is 44.

The square root of 77741972 is about 8817.1408064066. The cubic root of 77741972 is about 426.7942085611.

The spelling of 77741972 in words is "seventy-seven million, seven hundred forty-one thousand, nine hundred seventy-two".