78284884 has 12 divisors (see below), whose sum is σ = 138928608. Its totient is φ = 38591000.

The previous prime is 78284879. The next prime is 78284929. The reversal of 78284884 is 48848287.

It is a super-2 number, since 2×78284884² = 12257046125786912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137542 + ... + 138109.

It is an arithmetic number, because the mean of its divisors is an integer number (11577384).

Almost surely, 2^78284884 is an apocalyptic number.

It is an amenable number.

78284884 is a deficient number, since it is larger than the sum of its proper divisors (60643724).

78284884 is a wasteful number, since it uses less digits than its factorization.

78284884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275726 (or 275724 counting only the distinct ones).

The product of its digits is 917504, while the sum is 49.

The square root of 78284884 is about 8847.8745470311. The cubic root of 78284884 is about 427.7854122711.

The spelling of 78284884 in words is "seventy-eight million, two hundred eighty-four thousand, eight hundred eighty-four".