420391544 has 8 divisors (see below), whose sum is σ = 788234160. Its totient is φ = 210195768.

The previous prime is 420391459. The next prime is 420391553. The reversal of 420391544 is 445193024.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 420391544.

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, 26274464 + ... + 26274479.

It is an arithmetic number, because the mean of its divisors is an integer number (98529270).

Almost surely, 2^420391544 is an apocalyptic number.

It is an amenable number.

420391544 is a deficient number, since it is larger than the sum of its proper divisors (367842616).

420391544 is a wasteful number, since it uses less digits than its factorization.

420391544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52548949 (or 52548945 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 420391544 is about 20503.4520020410. The cubic root of 420391544 is about 749.1198825580.

The spelling of 420391544 in words is "four hundred twenty million, three hundred ninety-one thousand, five hundred forty-four".