77546040 has 128 divisors (see below), whose sum is σ = 273369600. Its totient is φ = 17349120.

The previous prime is 77546033. The next prime is 77546057. The reversal of 77546040 is 4064577.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 77545992 and 77546010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14901 + ... + 19419.

It is an arithmetic number, because the mean of its divisors is an integer number (2135700).

Almost surely, 2^77546040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77546040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136684800).

77546040 is an abundant number, since it is smaller than the sum of its proper divisors (195823560).

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

77546040 is a wasteful number, since it uses less digits than its factorization.

77546040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4557 (or 4553 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 77546040 is about 8806.0229388754. The cubic root of 77546040 is about 426.4353591081.

The spelling of 77546040 in words is "seventy-seven million, five hundred forty-six thousand, forty".