40978790 has 8 divisors (see below), whose sum is σ = 73761840. Its totient is φ = 16391512.

The previous prime is 40978787. The next prime is 40978799. The reversal of 40978790 is 9787904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40978790² = 3358522459728200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40978799) 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, 2048930 + ... + 2048949.

It is an arithmetic number, because the mean of its divisors is an integer number (9220230).

Almost surely, 2^40978790 is an apocalyptic number.

40978790 is a deficient number, since it is larger than the sum of its proper divisors (32783050).

40978790 is a wasteful number, since it uses less digits than its factorization.

40978790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097886.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 40978790 is about 6401.4678004345. The cubic root of 40978790 is about 344.7622530603.

The spelling of 40978790 in words is "forty million, nine hundred seventy-eight thousand, seven hundred ninety".