78284542 has 16 divisors (see below), whose sum is σ = 136206720. Its totient is φ = 33049368.

The previous prime is 78284519. The next prime is 78284561. The reversal of 78284542 is 24548287.

It is a super-2 number, since 2×78284542² = 12256939032299528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78284495 and 78284504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40792 + ... + 42667.

It is an arithmetic number, because the mean of its divisors is an integer number (8512920).

Almost surely, 2^78284542 is an apocalyptic number.

78284542 is a deficient number, since it is larger than the sum of its proper divisors (57922178).

78284542 is a wasteful number, since it uses less digits than its factorization.

78284542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83535.

The product of its digits is 143360, while the sum is 40.

The square root of 78284542 is about 8847.8552203345. The cubic root of 78284542 is about 427.7847893206.

The spelling of 78284542 in words is "seventy-eight million, two hundred eighty-four thousand, five hundred forty-two".