40642426 has 32 divisors (see below), whose sum is σ = 71663616. Its totient is φ = 17094000.

The previous prime is 40642421. The next prime is 40642447. The reversal of 40642426 is 62424604.

It is a junction number, because it is equal to n+sod(n) for n = 40642394 and 40642403.

It is not an unprimeable number, because it can be changed into a prime (40642421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14391 + ... + 16981.

It is an arithmetic number, because the mean of its divisors is an integer number (2239488).

Almost surely, 2^40642426 is an apocalyptic number.

40642426 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

40642426 is a deficient number, since it is larger than the sum of its proper divisors (31021190).

40642426 is a wasteful number, since it uses less digits than its factorization.

40642426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2658.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 40642426 is about 6375.1412533371. The cubic root of 40642426 is about 343.8163624603.

The spelling of 40642426 in words is "forty million, six hundred forty-two thousand, four hundred twenty-six".