287145120402 has 72 divisors (see below), whose sum is σ = 741374777052. Its totient is φ = 80040441600.

The previous prime is 287145120397. The next prime is 287145120461. The reversal of 287145120402 is 204021541782.

287145120402 is a `hidden beast` number, since 28 + 71 + 45 + 120 + 402 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 252768623121 + 34376497281 = 502761^2 + 185409^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3934099 + ... + 4006422.

Almost surely, 2^287145120402 is an apocalyptic number.

287145120402 is an abundant number, since it is smaller than the sum of its proper divisors (454229656650).

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

287145120402 is a wasteful number, since it uses less digits than its factorization.

287145120402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7940584 (or 7940574 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The spelling of 287145120402 in words is "two hundred eighty-seven billion, one hundred forty-five million, one hundred twenty thousand, four hundred two".