40378880 has 40 divisors (see below), whose sum is σ = 96820812. Its totient is φ = 16150528.

The previous prime is 40378867. The next prime is 40378903. The reversal of 40378880 is 8887304.

It can be written as a sum of positive squares in 2 ways, for example, as 40347904 + 30976 = 6352^2 + 176^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5327 + ... + 10446.

Almost surely, 2^40378880 is an apocalyptic number.

40378880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40378880 is an abundant number, since it is smaller than the sum of its proper divisors (56441932).

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

40378880 is an equidigital number, since it uses as much as digits as its factorization.

40378880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15796 (or 15780 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 40378880 is about 6354.4378193511. The cubic root of 40378880 is about 343.0715907084.

The spelling of 40378880 in words is "forty million, three hundred seventy-eight thousand, eight hundred eighty".