40137928 has 8 divisors (see below), whose sum is σ = 75258630. Its totient is φ = 20068960.

The previous prime is 40137919. The next prime is 40137931. The reversal of 40137928 is 82973104.

It can be written as a sum of positive squares in only one way, i.e., 27478564 + 12659364 = 5242^2 + 3558^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×40137928² = 3222106528266368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40137893 and 40137902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2508613 + ... + 2508628.

Almost surely, 2^40137928 is an apocalyptic number.

It is an amenable number.

40137928 is a deficient number, since it is larger than the sum of its proper divisors (35120702).

40137928 is a wasteful number, since it uses less digits than its factorization.

40137928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5017247 (or 5017243 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 40137928 is about 6335.4501024000. The cubic root of 40137928 is about 342.3878276527.

The spelling of 40137928 in words is "forty million, one hundred thirty-seven thousand, nine hundred twenty-eight".