40651620 has 96 divisors (see below), whose sum is σ = 119992320. Its totient is φ = 10268160.

The previous prime is 40651613. The next prime is 40651627. The reversal of 40651620 is 2615604.

It is an interprime number because it is at equal distance from previous prime (40651613) and next prime (40651627).

It is not an unprimeable number, because it can be changed into a prime (40651627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105949 + ... + 106331.

It is an arithmetic number, because the mean of its divisors is an integer number (1249920).

Almost surely, 2^40651620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40651620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59996160).

40651620 is an abundant number, since it is smaller than the sum of its proper divisors (79340700).

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

40651620 is a wasteful number, since it uses less digits than its factorization.

40651620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 40651620 is about 6375.8622946234. The cubic root of 40651620 is about 343.8422861860.

The spelling of 40651620 in words is "forty million, six hundred fifty-one thousand, six hundred twenty".