2867857256240 has 40 divisors (see below), whose sum is σ = 6695435253408. Its totient is φ = 1142382965760.

The previous prime is 2867857256239. The next prime is 2867857256249. The reversal of 2867857256240 is 426527587682.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (2867857256249) 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, 74354612 + ... + 74393171.

Almost surely, 2^{2867857256240} is an apocalyptic number.

2867857256240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2867857256240 is an abundant number, since it is smaller than the sum of its proper divisors (3827577997168).

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

2867857256240 is a wasteful number, since it uses less digits than its factorization.

2867857256240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148748037 (or 148748031 counting only the distinct ones).

The product of its (nonzero) digits is 90316800, while the sum is 62.

The spelling of 2867857256240 in words is "two trillion, eight hundred sixty-seven billion, eight hundred fifty-seven million, two hundred fifty-six thousand, two hundred forty".