421388764 has 24 divisors (see below), whose sum is σ = 777539840. Its totient is φ = 199271664.

The previous prime is 421388761. The next prime is 421388771. The reversal of 421388764 is 467883124.

It is a self number, because there is not a number n which added to its sum of digits gives 421388764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421388761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44557 + ... + 53179.

Almost surely, 2^421388764 is an apocalyptic number.

It is an amenable number.

421388764 is a deficient number, since it is larger than the sum of its proper divisors (356151076).

421388764 is a wasteful number, since it uses less digits than its factorization.

421388764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9289 (or 9287 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 421388764 is about 20527.7559416513. The cubic root of 421388764 is about 749.7117493778.

The spelling of 421388764 in words is "four hundred twenty-one million, three hundred eighty-eight thousand, seven hundred sixty-four".