40401908394 has 16 divisors (see below), whose sum is σ = 80814555360. Its totient is φ = 13465513040.

The previous prime is 40401908381. The next prime is 40401908461. The reversal of 40401908394 is 49380910404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398112 + ... + 489179.

It is an arithmetic number, because the mean of its divisors is an integer number (5050909710).

Almost surely, 2^40401908394 is an apocalyptic number.

40401908394 is an abundant number, since it is smaller than the sum of its proper divisors (40412646966).

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

40401908394 is a wasteful number, since it uses less digits than its factorization.

40401908394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894885.

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 40401908394 in words is "forty billion, four hundred one million, nine hundred eight thousand, three hundred ninety-four".