642036226 has 16 divisors (see below), whose sum is σ = 1070592768. Its totient is φ = 286765200.

The previous prime is 642036211. The next prime is 642036253. The reversal of 642036226 is 622630246.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 397480 + ... + 399091.

It is an arithmetic number, because the mean of its divisors is an integer number (66912048).

Almost surely, 2^642036226 is an apocalyptic number.

642036226 is a deficient number, since it is larger than the sum of its proper divisors (428556542).

642036226 is a wasteful number, since it uses less digits than its factorization.

642036226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796617.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 642036226 is about 25338.4337716442. The cubic root of 642036226 is about 862.6868492757.

The spelling of 642036226 in words is "six hundred forty-two million, thirty-six thousand, two hundred twenty-six".