78279025 has 12 divisors (see below), whose sum is σ = 105890544. Its totient is φ = 56930000.

The previous prime is 78279023. The next prime is 78279053. The reversal of 78279025 is 52097287.

It is not a de Polignac number, because 78279025 - 2¹ = 78279023 is a prime.

It is a super-2 number, since 2×78279025² = 12255211509901250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78279023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142051 + ... + 142600.

It is an arithmetic number, because the mean of its divisors is an integer number (8824212).

Almost surely, 2^78279025 is an apocalyptic number.

It is an amenable number.

78279025 is a deficient number, since it is larger than the sum of its proper divisors (27611519).

78279025 is a wasteful number, since it uses less digits than its factorization.

78279025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284672 (or 284667 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 78279025 is about 8847.5434443692. The cubic root of 78279025 is about 427.7747398946.

The spelling of 78279025 in words is "seventy-eight million, two hundred seventy-nine thousand, twenty-five".