77242972 has 12 divisors (see below), whose sum is σ = 135288216. Its totient is φ = 38589200.

The previous prime is 77242969. The next prime is 77242973. The reversal of 77242972 is 27924277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77242973) 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, 2218 + ... + 12625.

It is an arithmetic number, because the mean of its divisors is an integer number (11274018).

Almost surely, 2^77242972 is an apocalyptic number.

It is an amenable number.

77242972 is a deficient number, since it is larger than the sum of its proper divisors (58045244).

77242972 is a wasteful number, since it uses less digits than its factorization.

77242972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16148 (or 16146 counting only the distinct ones).

The product of its digits is 98784, while the sum is 40.

The square root of 77242972 is about 8788.7980975785. The cubic root of 77242972 is about 425.8790975496.

It can be divided in two parts, 77 and 242972, that added together give a square (243049 = 493²).

The spelling of 77242972 in words is "seventy-seven million, two hundred forty-two thousand, nine hundred seventy-two".