40402107838 has 4 divisors (see below), whose sum is σ = 60603161760. Its totient is φ = 20201053918.

The previous prime is 40402107827. The next prime is 40402107871. The reversal of 40402107838 is 83870120404.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 40402107797 and 40402107806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100526958 + ... + 10100526961.

It is an arithmetic number, because the mean of its divisors is an integer number (15150790440).

Almost surely, 2^40402107838 is an apocalyptic number.

40402107838 is a deficient number, since it is larger than the sum of its proper divisors (20201053922).

40402107838 is a wasteful number, since it uses less digits than its factorization.

40402107838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20201053921.

The product of its (nonzero) digits is 43008, while the sum is 37.

It can be divided in two parts, 40402 and 107838, that added together give a triangular number (148240 = T₅₄₄).

The spelling of 40402107838 in words is "forty billion, four hundred two million, one hundred seven thousand, eight hundred thirty-eight".