99977040 has 120 divisors (see below), whose sum is σ = 337978368. Its totient is φ = 26484480.

The previous prime is 99976999. The next prime is 99977041. The reversal of 99977040 is 4077999.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99977041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137157 + ... + 137883.

Almost surely, 2^99977040 is an apocalyptic number.

99977040 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99977040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168989184).

99977040 is an abundant number, since it is smaller than the sum of its proper divisors (238001328).

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

99977040 is a wasteful number, since it uses less digits than its factorization.

99977040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 99977040 is about 9998.8519340972. The cubic root of 99977040 is about 464.1233570156.

The spelling of 99977040 in words is "ninety-nine million, nine hundred seventy-seven thousand, forty".