642243446 has 32 divisors (see below), whose sum is σ = 1053864000. Its totient is φ = 291772800.

The previous prime is 642243409. The next prime is 642243457. The reversal of 642243446 is 644342246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 521960 + ... + 523188.

It is an arithmetic number, because the mean of its divisors is an integer number (32933250).

Almost surely, 2^642243446 is an apocalyptic number.

642243446 is a deficient number, since it is larger than the sum of its proper divisors (411620554).

642243446 is a wasteful number, since it uses less digits than its factorization.

642243446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544.

The product of its digits is 110592, while the sum is 35.

The square root of 642243446 is about 25342.5224869191. The cubic root of 642243446 is about 862.7796512769.

The spelling of 642243446 in words is "six hundred forty-two million, two hundred forty-three thousand, four hundred forty-six".