40102140 has 48 divisors (see below), whose sum is σ = 120925728. Its totient is φ = 9871104.

The previous prime is 40102109. The next prime is 40102147. The reversal of 40102140 is 4120104.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40102147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24927 + ... + 26486.

It is an arithmetic number, because the mean of its divisors is an integer number (2519286).

Almost surely, 2^40102140 is an apocalyptic number.

It is an amenable number.

40102140 is an abundant number, since it is smaller than the sum of its proper divisors (80823588).

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

40102140 is a wasteful number, since it uses less digits than its factorization.

40102140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51438 (or 51436 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 40102140 is about 6332.6250481139. The cubic root of 40102140 is about 342.2860368213.

Adding to 40102140 its reverse (4120104), we get a palindrome (44222244).

The spelling of 40102140 in words is "forty million, one hundred two thousand, one hundred forty".