40621520 has 40 divisors (see below), whose sum is σ = 94822056. Its totient is φ = 16183808.

The previous prime is 40621463. The next prime is 40621549. The reversal of 40621520 is 2512604.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11806096 + 28815424 = 3436^2 + 5368^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×40621520² = 3300215774220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 40621492 and 40621501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22574 + ... + 24306.

Almost surely, 2^40621520 is an apocalyptic number.

40621520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40621520 is an abundant number, since it is smaller than the sum of its proper divisors (54200536).

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

40621520 is a wasteful number, since it uses less digits than its factorization.

40621520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039 (or 2033 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 40621520 is about 6373.5013924844. The cubic root of 40621520 is about 343.7574006120.

The spelling of 40621520 in words is "forty million, six hundred twenty-one thousand, five hundred twenty".