387798840 has 512 divisors, whose sum is σ = 1586995200. Its totient is φ = 83980800.

The previous prime is 387798823. The next prime is 387798841. The reversal of 387798840 is 48897783.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387798841) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12509625 + ... + 12509655.

It is an arithmetic number, because the mean of its divisors is an integer number (3099600).

Almost surely, 2^387798840 is an apocalyptic number.

387798840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387798840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (793497600).

387798840 is an abundant number, since it is smaller than the sum of its proper divisors (1199196360).

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

387798840 is a wasteful number, since it uses less digits than its factorization.

387798840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The square root of 387798840 is about 19692.6087657273. The cubic root of 387798840 is about 729.2372341754.

The spelling of 387798840 in words is "three hundred eighty-seven million, seven hundred ninety-eight thousand, eight hundred forty".