420729970 has 32 divisors (see below), whose sum is σ = 785862000. Its totient is φ = 161984256.

The previous prime is 420729919. The next prime is 420729989. The reversal of 420729970 is 79927024.

It can be written as a sum of positive squares in 8 ways, for example, as 227436561 + 193293409 = 15081^2 + 13903^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99132 + ... + 103288.

Almost surely, 2^420729970 is an apocalyptic number.

420729970 is a deficient number, since it is larger than the sum of its proper divisors (365132030).

420729970 is a wasteful number, since it uses less digits than its factorization.

420729970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4542.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 420729970 is about 20511.7032447332. The cubic root of 420729970 is about 749.3208488944.

The spelling of 420729970 in words is "four hundred twenty million, seven hundred twenty-nine thousand, nine hundred seventy".