420431330 has 16 divisors (see below), whose sum is σ = 825574464. Its totient is φ = 152884080.

The previous prime is 420431287. The next prime is 420431359. The reversal of 420431330 is 33134024.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1910942 + ... + 1911161.

It is an arithmetic number, because the mean of its divisors is an integer number (51598404).

Almost surely, 2^420431330 is an apocalyptic number.

420431330 is a deficient number, since it is larger than the sum of its proper divisors (405143134).

420431330 is a wasteful number, since it uses less digits than its factorization.

420431330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822121.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 420431330 is about 20504.4222059535. The cubic root of 420431330 is about 749.1435141335.

Adding to 420431330 its reverse (33134024), we get a palindrome (453565354).

The spelling of 420431330 in words is "four hundred twenty million, four hundred thirty-one thousand, three hundred thirty".