77740044 has 24 divisors (see below), whose sum is σ = 185613120. Its totient is φ = 25310544.

The previous prime is 77739983. The next prime is 77740049. The reversal of 77740044 is 44004777.

It is a super-2 number, since 2×77740044² = 12087028882243872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77739987 and 77740014.

It is not an unprimeable number, because it can be changed into a prime (77740049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74814 + ... + 75845.

It is an arithmetic number, because the mean of its divisors is an integer number (7733880).

Almost surely, 2^77740044 is an apocalyptic number.

It is an amenable number.

77740044 is an abundant number, since it is smaller than the sum of its proper divisors (107873076).

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

77740044 is a wasteful number, since it uses less digits than its factorization.

77740044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150709 (or 150707 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 33.

The square root of 77740044 is about 8817.0314732341. The cubic root of 77740044 is about 426.7906803681.

The spelling of 77740044 in words is "seventy-seven million, seven hundred forty thousand, forty-four".