1642399212 has 18 divisors (see below), whose sum is σ = 3832592428. Its totient is φ = 547419608.

The previous prime is 1642399183. The next prime is 1642399229. The reversal of 1642399212 is 2129932461.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 134539 + ... + 146237.

Almost surely, 2^1642399212 is an apocalyptic number.

1642399212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1642399212 is an abundant number, since it is smaller than the sum of its proper divisors (2190193216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642399212 is an frugal number, since it uses more digits than its factorization.

1642399212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23405 (or 11704 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 1642399212 is about 40526.5247954966. The cubic root of 1642399212 is about 1179.8484943854.

The spelling of 1642399212 in words is "one billion, six hundred forty-two million, three hundred ninety-nine thousand, two hundred twelve".