101912840 has 16 divisors (see below), whose sum is σ = 229303980. Its totient is φ = 40765120.

The previous prime is 101912821. The next prime is 101912843. The reversal of 101912840 is 48219101.

It can be written as a sum of positive squares in 2 ways, for example, as 100360324 + 1552516 = 10018^2 + 1246^2 .

It is not an unprimeable number, because it can be changed into a prime (101912843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1273871 + ... + 1273950.

Almost surely, 2^101912840 is an apocalyptic number.

101912840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101912840 is an abundant number, since it is smaller than the sum of its proper divisors (127391140).

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

101912840 is a wasteful number, since it uses less digits than its factorization.

101912840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547832 (or 2547828 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 101912840 is about 10095.1889531598. The cubic root of 101912840 is about 467.0997498865.

It can be divided in two parts, 10191 and 2840, that added together give a palindrome (13031).

The spelling of 101912840 in words is "one hundred one million, nine hundred twelve thousand, eight hundred forty".