249541878 has 32 divisors (see below), whose sum is σ = 545495040. Its totient is φ = 75761280.

The previous prime is 249541871. The next prime is 249541883. The reversal of 249541878 is 878145942.

It is a happy number.

It is a super-2 number, since 2×249541878² = 124542297751533768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249541871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36298 + ... + 42621.

It is an arithmetic number, because the mean of its divisors is an integer number (17046720).

Almost surely, 2^249541878 is an apocalyptic number.

249541878 is an abundant number, since it is smaller than the sum of its proper divisors (295953162).

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

249541878 is a wasteful number, since it uses less digits than its factorization.

249541878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78972.

The product of its digits is 645120, while the sum is 48.

The square root of 249541878 is about 15796.8945682371. The cubic root of 249541878 is about 629.5754912942.

The spelling of 249541878 in words is "two hundred forty-nine million, five hundred forty-one thousand, eight hundred seventy-eight".