40707428 has 12 divisors (see below), whose sum is σ = 72214380. Its totient is φ = 20074752.

The previous prime is 40707427. The next prime is 40707439. The reversal of 40707428 is 82470704.

It can be written as a sum of positive squares in 2 ways, for example, as 8988004 + 31719424 = 2998^2 + 5632^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40707394 and 40707403.

It is not an unprimeable number, because it can be changed into a prime (40707427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69413 + ... + 69996.

It is an arithmetic number, because the mean of its divisors is an integer number (6017865).

Almost surely, 2^40707428 is an apocalyptic number.

It is an amenable number.

40707428 is a deficient number, since it is larger than the sum of its proper divisors (31506952).

40707428 is a wasteful number, since it uses less digits than its factorization.

40707428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139486 (or 139484 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 40707428 is about 6380.2372996621. The cubic root of 40707428 is about 343.9995605727. Note that the first 3 decimals are identical.

The spelling of 40707428 in words is "forty million, seven hundred seven thousand, four hundred twenty-eight".