78230540 has 48 divisors (see below), whose sum is σ = 169075200. Its totient is φ = 30393792.

The previous prime is 78230507. The next prime is 78230561. The reversal of 78230540 is 4503287.

78230540 = T₃₂₁ + T₃₂₂ + ... + T₇₉₄.

It is a happy number.

It is a super-2 number, since 2×78230540² = 12240034777383200, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 105491 + ... + 106229.

It is an arithmetic number, because the mean of its divisors is an integer number (3522400).

Almost surely, 2^78230540 is an apocalyptic number.

It is an amenable number.

78230540 is an abundant number, since it is smaller than the sum of its proper divisors (90844660).

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

78230540 is a wasteful number, since it uses less digits than its factorization.

78230540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 78230540 is about 8844.8029938490. The cubic root of 78230540 is about 427.6864023018.

The spelling of 78230540 in words is "seventy-eight million, two hundred thirty thousand, five hundred forty".