78154872 has 16 divisors (see below), whose sum is σ = 195387240. Its totient is φ = 26051616.

The previous prime is 78154871. The next prime is 78154873. The reversal of 78154872 is 27845187.

It is an interprime number because it is at equal distance from previous prime (78154871) and next prime (78154873).

It is a super-2 number, since 2×78154872² = 12216368034672768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78154871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1628203 + ... + 1628250.

Almost surely, 2^78154872 is an apocalyptic number.

It is an amenable number.

78154872 is an abundant number, since it is smaller than the sum of its proper divisors (117232368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78154872 is a wasteful number, since it uses less digits than its factorization.

78154872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256462 (or 3256458 counting only the distinct ones).

The product of its digits is 125440, while the sum is 42.

The square root of 78154872 is about 8840.5244188340. The cubic root of 78154872 is about 427.5484654878.

The spelling of 78154872 in words is "seventy-eight million, one hundred fifty-four thousand, eight hundred seventy-two".