77215672 has 8 divisors (see below), whose sum is σ = 144779400. Its totient is φ = 38607832.

The previous prime is 77215657. The next prime is 77215673. The reversal of 77215672 is 27651277.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×77215672³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77215673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4825972 + ... + 4825987.

It is an arithmetic number, because the mean of its divisors is an integer number (18097425).

Almost surely, 2^77215672 is an apocalyptic number.

It is an amenable number.

77215672 is a deficient number, since it is larger than the sum of its proper divisors (67563728).

77215672 is a wasteful number, since it uses less digits than its factorization.

77215672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9651965 (or 9651961 counting only the distinct ones).

The product of its digits is 41160, while the sum is 37.

The square root of 77215672 is about 8787.2448469358. The cubic root of 77215672 is about 425.8289187909.

The spelling of 77215672 in words is "seventy-seven million, two hundred fifteen thousand, six hundred seventy-two".