40278725 has 24 divisors (see below), whose sum is σ = 51350880. Its totient is φ = 31331520.

The previous prime is 40278691. The next prime is 40278761. The reversal of 40278725 is 52787204.

40278725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-40278725 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232739 + ... + 232911.

It is an arithmetic number, because the mean of its divisors is an integer number (2139620).

Almost surely, 2^40278725 is an apocalyptic number.

It is an amenable number.

40278725 is a deficient number, since it is larger than the sum of its proper divisors (11072155).

40278725 is a wasteful number, since it uses less digits than its factorization.

40278725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 40278725 is about 6346.5522136039. The cubic root of 40278725 is about 342.7877064659.

The spelling of 40278725 in words is "forty million, two hundred seventy-eight thousand, seven hundred twenty-five".