387489191040 has 512 divisors, whose sum is σ = 1590534144000. Its totient is φ = 87319572480.

The previous prime is 387489191027. The next prime is 387489191071. The reversal of 387489191040 is 40191984783.

387489191040 is a `hidden beast` number, since 38 + 7 + 489 + 1 + 91 + 0 + 40 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8565601 + ... + 8610719.

It is an arithmetic number, because the mean of its divisors is an integer number (3106512000).

Almost surely, 2^387489191040 is an apocalyptic number.

387489191040 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 387489191040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (795267072000).

387489191040 is an abundant number, since it is smaller than the sum of its proper divisors (1203044952960).

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

387489191040 is a wasteful number, since it uses less digits than its factorization.

387489191040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45225 (or 45207 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 387489191040 in words is "three hundred eighty-seven billion, four hundred eighty-nine million, one hundred ninety-one thousand, forty".