77474440 has 32 divisors (see below), whose sum is σ = 184573080. Its totient is φ = 29166592.

The previous prime is 77474429. The next prime is 77474447. The reversal of 77474440 is 4447477.

It can be written as a sum of positive squares in 4 ways, for example, as 73856836 + 3617604 = 8594^2 + 1902^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77474440.

It is not an unprimeable number, because it can be changed into a prime (77474447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56287 + ... + 57646.

Almost surely, 2^77474440 is an apocalyptic number.

It is an amenable number.

77474440 is an abundant number, since it is smaller than the sum of its proper divisors (107098640).

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

77474440 is a wasteful number, since it uses less digits than its factorization.

77474440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113961 (or 113957 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 37.

The square root of 77474440 is about 8801.9566006656. The cubic root of 77474440 is about 426.3040729124.

The spelling of 77474440 in words is "seventy-seven million, four hundred seventy-four thousand, four hundred forty".