68400454 has 4 divisors (see below), whose sum is σ = 102600684. Its totient is φ = 34200226.

The previous prime is 68400439. The next prime is 68400461. The reversal of 68400454 is 45400486.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×68400454² = 9357244214812232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17100112 + ... + 17100115.

It is an arithmetic number, because the mean of its divisors is an integer number (25650171).

Almost surely, 2^68400454 is an apocalyptic number.

68400454 is a deficient number, since it is larger than the sum of its proper divisors (34200230).

68400454 is a wasteful number, since it uses less digits than its factorization.

68400454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34200229.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 68400454 is about 8270.4566983934. The cubic root of 68400454 is about 408.9651753875.

The spelling of 68400454 in words is "sixty-eight million, four hundred thousand, four hundred fifty-four".