40378890 has 32 divisors (see below), whose sum is σ = 98360640. Its totient is φ = 10606464.

The previous prime is 40378867. The next prime is 40378903. The reversal of 40378890 is 9887304.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8035 + ... + 12054.

It is an arithmetic number, because the mean of its divisors is an integer number (3073770).

Almost surely, 2^40378890 is an apocalyptic number.

40378890 is an abundant number, since it is smaller than the sum of its proper divisors (57981750).

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

40378890 is a wasteful number, since it uses less digits than its factorization.

40378890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20166.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 40378890 is about 6354.4386062028. The cubic root of 40378890 is about 343.0716190295.

The spelling of 40378890 in words is "forty million, three hundred seventy-eight thousand, eight hundred ninety".