78892087 has 6 divisors (see below), whose sum is σ = 83806088. Its totient is φ = 74251104.

The previous prime is 78892069. The next prime is 78892133. The reversal of 78892087 is 78029887.

It is not a de Polignac number, because 78892087 - 2¹¹ = 78890039 is a prime.

It is a super-2 number, since 2×78892087² = 12447922782431138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78892087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78892067) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136203 + ... + 136780.

Almost surely, 2^78892087 is an apocalyptic number.

78892087 is a deficient number, since it is larger than the sum of its proper divisors (4914001).

78892087 is a wasteful number, since it uses less digits than its factorization.

78892087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273017 (or 273000 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 78892087 is about 8882.1217622818. The cubic root of 78892087 is about 428.8885792184. Note that the first 3 decimals are identical.

The spelling of 78892087 in words is "seventy-eight million, eight hundred ninety-two thousand, eighty-seven".