76542240 has 48 divisors (see below), whose sum is σ = 241109568. Its totient is φ = 20411136.

The previous prime is 76542239. The next prime is 76542247. The reversal of 76542240 is 4224567.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 76542198 and 76542207.

It is not an unprimeable number, because it can be changed into a prime (76542247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79252 + ... + 80211.

It is an arithmetic number, because the mean of its divisors is an integer number (5023116).

Almost surely, 2^76542240 is an apocalyptic number.

It is an amenable number.

76542240 is an abundant number, since it is smaller than the sum of its proper divisors (164567328).

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

76542240 is a wasteful number, since it uses less digits than its factorization.

76542240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159481 (or 159473 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 76542240 is about 8748.8422091154. The cubic root of 76542240 is about 424.5873549591.

The spelling of 76542240 in words is "seventy-six million, five hundred forty-two thousand, two hundred forty".