90273878487 has 40 divisors (see below), whose sum is σ = 145610751440. Its totient is φ = 55406332800.

The previous prime is 90273878473. The next prime is 90273878491. The reversal of 90273878487 is 78487837209.

90273878487 is a `hidden beast` number, since 9 + 0 + 2 + 73 + 87 + 8 + 487 = 666.

It is not a de Polignac number, because 90273878487 - 2²⁷ = 90139660759 is a prime.

It is a super-3 number, since 3×90273878487³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90273878447) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 285987 + ... + 512187.

It is an arithmetic number, because the mean of its divisors is an integer number (3640268786).

Almost surely, 2^90273878487 is an apocalyptic number.

90273878487 is a deficient number, since it is larger than the sum of its proper divisors (55336872953).

90273878487 is a wasteful number, since it uses less digits than its factorization.

90273878487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226605 (or 226596 counting only the distinct ones).

The product of its (nonzero) digits is 37933056, while the sum is 63.

The spelling of 90273878487 in words is "ninety billion, two hundred seventy-three million, eight hundred seventy-eight thousand, four hundred eighty-seven".