420724137938 has 16 divisors (see below), whose sum is σ = 679642076736. Its totient is φ = 194177292240.

The previous prime is 420724137937. The next prime is 420724137943. The reversal of 420724137938 is 839731427024.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (420724137937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2829395 + ... + 2974377.

It is an arithmetic number, because the mean of its divisors is an integer number (42477629796).

Almost surely, 2^420724137938 is an apocalyptic number.

420724137938 is a deficient number, since it is larger than the sum of its proper divisors (258917938798).

420724137938 is a wasteful number, since it uses less digits than its factorization.

420724137938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256609.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 420724137938 in words is "four hundred twenty billion, seven hundred twenty-four million, one hundred thirty-seven thousand, nine hundred thirty-eight".