40646520 has 96 divisors (see below), whose sum is σ = 137872800. Its totient is φ = 10365696.

The previous prime is 40646479. The next prime is 40646531. The reversal of 40646520 is 2564604.

It is a happy number.

40646520 is a `hidden beast` number, since 4 + 0 + 6 + 4 + 652 + 0 = 666.

It is a super-2 number, since 2×40646520² = 3304279176220800, which contains 22 as substring.

It is a zygodrome in base 3.

It is a congruent number.

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, 5826 + ... + 10734.

It is an arithmetic number, because the mean of its divisors is an integer number (1436175).

Almost surely, 2^40646520 is an apocalyptic number.

40646520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40646520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68936400).

40646520 is an abundant number, since it is smaller than the sum of its proper divisors (97226280).

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

40646520 is a wasteful number, since it uses less digits than its factorization.

40646520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4949 (or 4942 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 40646520 is about 6375.4623361761. The cubic root of 40646520 is about 343.8279065295.

The spelling of 40646520 in words is "forty million, six hundred forty-six thousand, five hundred twenty".