78890025 has 24 divisors (see below), whose sum is σ = 130693024. Its totient is φ = 41990400.

The previous prime is 78889963. The next prime is 78890039. The reversal of 78890025 is 52009887.

It is not a de Polignac number, because 78890025 - 2¹³ = 78881833 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60177 + ... + 61473.

Almost surely, 2^78890025 is an apocalyptic number.

78890025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78890025 is a deficient number, since it is larger than the sum of its proper divisors (51802999).

78890025 is a wasteful number, since it uses less digits than its factorization.

78890025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121 (or 2116 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 78890025 is about 8882.0056856546. The cubic root of 78890025 is about 428.8848425701.

The spelling of 78890025 in words is "seventy-eight million, eight hundred ninety thousand, twenty-five".