100297840 has 20 divisors (see below), whose sum is σ = 233192664. Its totient is φ = 40119104.

The previous prime is 100297829. The next prime is 100297877. The reversal of 100297840 is 48792001.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626782 + ... + 626941.

Almost surely, 2^100297840 is an apocalyptic number.

100297840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100297840 is an abundant number, since it is smaller than the sum of its proper divisors (132894824).

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

100297840 is a wasteful number, since it uses less digits than its factorization.

100297840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253736 (or 1253730 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 100297840 is about 10014.8809278992. The cubic root of 100297840 is about 464.6192435571.

The spelling of 100297840 in words is "one hundred million, two hundred ninety-seven thousand, eight hundred forty".