286438740 has 48 divisors (see below), whose sum is σ = 916605312. Its totient is φ = 65471616.

The previous prime is 286438739. The next prime is 286438819. The reversal of 286438740 is 47834682.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 286438692 and 286438701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340579 + ... + 341418.

It is an arithmetic number, because the mean of its divisors is an integer number (19095944).

Almost surely, 2^286438740 is an apocalyptic number.

286438740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

286438740 is an abundant number, since it is smaller than the sum of its proper divisors (630166572).

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

286438740 is a wasteful number, since it uses less digits than its factorization.

286438740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682016 (or 682014 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The square root of 286438740 is about 16924.5011743330. The cubic root of 286438740 is about 659.1899612252.

The spelling of 286438740 in words is "two hundred eighty-six million, four hundred thirty-eight thousand, seven hundred forty".