99937440 has 72 divisors (see below), whose sum is σ = 341041428. Its totient is φ = 26649600.

The previous prime is 99937433. The next prime is 99937469. The reversal of 99937440 is 4473999.

It can be written as a sum of positive squares in 2 ways, for example, as 99920016 + 17424 = 9996^2 + 132^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33261 + ... + 36140.

Almost surely, 2^99937440 is an apocalyptic number.

99937440 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99937440 is an abundant number, since it is smaller than the sum of its proper divisors (241103988).

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

99937440 is a wasteful number, since it uses less digits than its factorization.

99937440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69422 (or 69411 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 99937440 is about 9996.8715106277. The cubic root of 99937440 is about 464.0620705706.

The spelling of 99937440 in words is "ninety-nine million, nine hundred thirty-seven thousand, four hundred forty".