78454888 has 8 divisors (see below), whose sum is σ = 147102930. Its totient is φ = 39227440.

The previous prime is 78454879. The next prime is 78454897. The reversal of 78454888 is 88845487.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78454879) and next prime (78454897).

It can be written as a sum of positive squares in only one way, i.e., 61496964 + 16957924 = 7842^2 + 4118^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-4 number, since 4×78454888⁴ (a number of 33 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4903423 + ... + 4903438.

Almost surely, 2^78454888 is an apocalyptic number.

It is an amenable number.

78454888 is a deficient number, since it is larger than the sum of its proper divisors (68648042).

78454888 is a wasteful number, since it uses less digits than its factorization.

78454888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9806867 (or 9806863 counting only the distinct ones).

The product of its digits is 2293760, while the sum is 52.

The square root of 78454888 is about 8857.4763900335. The cubic root of 78454888 is about 428.0948489822.

The spelling of 78454888 in words is "seventy-eight million, four hundred fifty-four thousand, eight hundred eighty-eight".