68451900 has 72 divisors (see below), whose sum is σ = 216069504. Its totient is φ = 16593600.

The previous prime is 68451893. The next prime is 68451959. The reversal of 68451900 is 915486.

It is a super-2 number, since 2×68451900² = 9371325227220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7072 + ... + 13671.

Almost surely, 2^68451900 is an apocalyptic number.

68451900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68451900 is an abundant number, since it is smaller than the sum of its proper divisors (147617604).

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

68451900 is a wasteful number, since it uses less digits than its factorization.

68451900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20771 (or 20764 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 68451900 is about 8273.5663410648. The cubic root of 68451900 is about 409.0676812850.

The spelling of 68451900 in words is "sixty-eight million, four hundred fifty-one thousand, nine hundred".