420623390 has 32 divisors (see below), whose sum is σ = 839963520. Its totient is φ = 150359200.

The previous prime is 420623389. The next prime is 420623393. The reversal of 420623390 is 93326024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420623393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25916 + ... + 38895.

It is an arithmetic number, because the mean of its divisors is an integer number (26248860).

Almost surely, 2^420623390 is an apocalyptic number.

420623390 is a deficient number, since it is larger than the sum of its proper divisors (419340130).

420623390 is a wasteful number, since it uses less digits than its factorization.

420623390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64888.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 420623390 is about 20509.1050511718. The cubic root of 420623390 is about 749.2575704923.

The spelling of 420623390 in words is "four hundred twenty million, six hundred twenty-three thousand, three hundred ninety".