40139154 has 48 divisors (see below), whose sum is σ = 97456320. Its totient is φ = 11832480.

The previous prime is 40139149. The next prime is 40139171. The reversal of 40139154 is 45193104.

It is a super-2 number, since 2×40139154² = 3222303367671432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4587 + ... + 10065.

It is an arithmetic number, because the mean of its divisors is an integer number (2030340).

Almost surely, 2^40139154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40139154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48728160).

40139154 is an abundant number, since it is smaller than the sum of its proper divisors (57317166).

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

40139154 is a wasteful number, since it uses less digits than its factorization.

40139154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5535 (or 5532 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 40139154 is about 6335.5468587960. The cubic root of 40139154 is about 342.3913136589.

The spelling of 40139154 in words is "forty million, one hundred thirty-nine thousand, one hundred fifty-four".