28532940978870 has 384 divisors, whose sum is σ = 82244478314880. Its totient is φ = 7036112977920.

The previous prime is 28532940978769. The next prime is 28532940978881. The reversal of 28532940978870 is 7887904923582.

28532940978870 is a `hidden beast` number, since 2 + 8 + 53 + 29 + 409 + 7 + 88 + 70 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 690164400 + ... + 690205740.

It is an arithmetic number, because the mean of its divisors is an integer number (214178328945).

Almost surely, 2^{28532940978870} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28532940978870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41122239157440).

28532940978870 is an abundant number, since it is smaller than the sum of its proper divisors (53711537336010).

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

28532940978870 is a wasteful number, since it uses less digits than its factorization.

28532940978870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41565 (or 41540 counting only the distinct ones).

The product of its (nonzero) digits is 487710720, while the sum is 72.

The spelling of 28532940978870 in words is "twenty-eight trillion, five hundred thirty-two billion, nine hundred forty million, nine hundred seventy-eight thousand, eight hundred seventy".