287939946 has 32 divisors (see below), whose sum is σ = 692789760. Its totient is φ = 77938416.

The previous prime is 287939917. The next prime is 287939963. The reversal of 287939946 is 649939782.

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 179616 + ... + 181211.

It is an arithmetic number, because the mean of its divisors is an integer number (21649680).

Almost surely, 2^287939946 is an apocalyptic number.

287939946 is an abundant number, since it is smaller than the sum of its proper divisors (404849814).

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

287939946 is a wasteful number, since it uses less digits than its factorization.

287939946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360858.

The product of its digits is 5878656, while the sum is 57.

The square root of 287939946 is about 16968.7932982873. The cubic root of 287939946 is about 660.3395452133.

Adding to 287939946 its sum of digits (57), we get a triangular number (287940003 = T₂₃₉₉₇).

The spelling of 287939946 in words is "two hundred eighty-seven million, nine hundred thirty-nine thousand, nine hundred forty-six".