40135620 has 48 divisors (see below), whose sum is σ = 128435328. Its totient is φ = 9173760.

The previous prime is 40135609. The next prime is 40135633. The reversal of 40135620 is 2653104.

It is a happy number.

It is a super-2 number, since 2×40135620² = 3221735985568800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47361 + ... + 48200.

It is an arithmetic number, because the mean of its divisors is an integer number (2675736).

Almost surely, 2^40135620 is an apocalyptic number.

It is an amenable number.

40135620 is an abundant number, since it is smaller than the sum of its proper divisors (88299708).

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

40135620 is a wasteful number, since it uses less digits than its factorization.

40135620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95580 (or 95578 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 40135620 is about 6335.2679501344. The cubic root of 40135620 is about 342.3812648970.

Adding to 40135620 its reverse (2653104), we get a palindrome (42788724).

It can be divided in two parts, 40135 and 620, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 40135620 in words is "forty million, one hundred thirty-five thousand, six hundred twenty".