77547044 has 12 divisors (see below), whose sum is σ = 140387100. Its totient is φ = 37436448.

The previous prime is 77547023. The next prime is 77547091. The reversal of 77547044 is 44074577.

It can be written as a sum of positive squares in 2 ways, for example, as 32924644 + 44622400 = 5738^2 + 6680^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77546989 and 77547007.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334139 + ... + 334370.

It is an arithmetic number, because the mean of its divisors is an integer number (11698925).

Almost surely, 2^77547044 is an apocalyptic number.

It is an amenable number.

77547044 is a deficient number, since it is larger than the sum of its proper divisors (62840056).

77547044 is a wasteful number, since it uses less digits than its factorization.

77547044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668542 (or 668540 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 38.

The square root of 77547044 is about 8806.0799451288. The cubic root of 77547044 is about 426.4371994739.

The spelling of 77547044 in words is "seventy-seven million, five hundred forty-seven thousand, forty-four".