78273230 has 16 divisors (see below), whose sum is σ = 161019360. Its totient is φ = 26836512.

The previous prime is 78273211. The next prime is 78273259. The reversal of 78273230 is 3237287.

It is a happy number.

It is a super-2 number, since 2×78273230² = 12253397069265800, 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 7 ways as a sum of consecutive naturals, for example, 559025 + ... + 559164.

It is an arithmetic number, because the mean of its divisors is an integer number (10063710).

Almost surely, 2^78273230 is an apocalyptic number.

78273230 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78273230 is an abundant number, since it is smaller than the sum of its proper divisors (82746130).

78273230 is a wasteful number, since it uses less digits than its factorization.

78273230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118203.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 78273230 is about 8847.2159462737. The cubic root of 78273230 is about 427.7641835725.

The spelling of 78273230 in words is "seventy-eight million, two hundred seventy-three thousand, two hundred thirty".