78341887 has 16 divisors (see below), whose sum is σ = 88381440. Its totient is φ = 68900832.

The previous prime is 78341881. The next prime is 78341891. The reversal of 78341887 is 78814387.

It is a de Polignac number, because none of the positive numbers 2^k-78341887 is a prime.

It is a super-2 number, since 2×78341887² = 12274902517441538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78341881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142948 + ... + 143494.

It is an arithmetic number, because the mean of its divisors is an integer number (5523840).

Almost surely, 2^78341887 is an apocalyptic number.

78341887 is a deficient number, since it is larger than the sum of its proper divisors (10039553).

78341887 is a wasteful number, since it uses less digits than its factorization.

78341887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062.

The product of its digits is 301056, while the sum is 46.

The square root of 78341887 is about 8851.0952429629. The cubic root of 78341887 is about 427.8892174774.

The spelling of 78341887 in words is "seventy-eight million, three hundred forty-one thousand, eight hundred eighty-seven".