99477640 has 32 divisors (see below), whose sum is σ = 224245080. Its totient is φ = 39716352.

The previous prime is 99477617. The next prime is 99477643. The reversal of 99477640 is 4677499.

It can be written as a sum of positive squares in 4 ways, for example, as 46158436 + 53319204 = 6794^2 + 7302^2 .

It is not an unprimeable number, because it can be changed into a prime (99477643) 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, 22492 + ... + 26548.

Almost surely, 2^99477640 is an apocalyptic number.

It is an amenable number.

99477640 is an abundant number, since it is smaller than the sum of its proper divisors (124767440).

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

99477640 is a wasteful number, since it uses less digits than its factorization.

99477640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4681 (or 4677 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 99477640 is about 9973.8478031299. The cubic root of 99477640 is about 463.3492785891.

The spelling of 99477640 in words is "ninety-nine million, four hundred seventy-seven thousand, six hundred forty".