78143454 has 24 divisors (see below), whose sum is σ = 175582680. Its totient is φ = 26047656.

The previous prime is 78143449. The next prime is 78143477. The reversal of 78143454 is 45434187.

It is a super-2 number, since 2×78143454² = 12212798806100232, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79909 + ... + 80880.

It is an arithmetic number, because the mean of its divisors is an integer number (7315945).

Almost surely, 2^78143454 is an apocalyptic number.

78143454 is an abundant number, since it is smaller than the sum of its proper divisors (97439226).

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

78143454 is a wasteful number, since it uses less digits than its factorization.

78143454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160806 (or 160794 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 78143454 is about 8839.8786190762. The cubic root of 78143454 is about 427.5276436418.

The spelling of 78143454 in words is "seventy-eight million, one hundred forty-three thousand, four hundred fifty-four".