78272025 has 24 divisors (see below), whose sum is σ = 139366080. Its totient is φ = 38533440.

The previous prime is 78272023. The next prime is 78272027. The reversal of 78272025 is 52027287.

It is an interprime number because it is at equal distance from previous prime (78272023) and next prime (78272027).

It is not a de Polignac number, because 78272025 - 2¹ = 78272023 is a prime.

It is a super-2 number, since 2×78272025² = 12253019795201250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78272021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39165 + ... + 41114.

It is an arithmetic number, because the mean of its divisors is an integer number (5806920).

Almost surely, 2^78272025 is an apocalyptic number.

78272025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78272025 is a deficient number, since it is larger than the sum of its proper divisors (61094055).

78272025 is a wasteful number, since it uses less digits than its factorization.

78272025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80305 (or 80300 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 78272025 is about 8847.1478454924. The cubic root of 78272025 is about 427.7619884479.

The spelling of 78272025 in words is "seventy-eight million, two hundred seventy-two thousand, twenty-five".