78283984 has 20 divisors (see below), whose sum is σ = 154163620. Its totient is φ = 38499840.

The previous prime is 78283979. The next prime is 78283993. The reversal of 78283984 is 48938287.

It can be written as a sum of positive squares in 2 ways, for example, as 3841600 + 74442384 = 1960^2 + 8628^2 .

It is a super-2 number, since 2×78283984² = 12256764301824512, 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, 39129 + ... + 41080.

It is an arithmetic number, because the mean of its divisors is an integer number (7708181).

Almost surely, 2^78283984 is an apocalyptic number.

It is an amenable number.

78283984 is a deficient number, since it is larger than the sum of its proper divisors (75879636).

78283984 is a wasteful number, since it uses less digits than its factorization.

78283984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80278 (or 80272 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The square root of 78283984 is about 8847.8236872126. The cubic root of 78283984 is about 427.7837729237.

The spelling of 78283984 in words is "seventy-eight million, two hundred eighty-three thousand, nine hundred eighty-four".