388372140 has 216 divisors, whose sum is σ = 1352490048. Its totient is φ = 89856000.

The previous prime is 388372099. The next prime is 388372207. The reversal of 388372140 is 41273883.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 388372095 and 388372104.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 516765 + ... + 517515.

It is an arithmetic number, because the mean of its divisors is an integer number (6261528).

Almost surely, 2^388372140 is an apocalyptic number.

388372140 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 388372140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676245024).

388372140 is an abundant number, since it is smaller than the sum of its proper divisors (964117908).

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

388372140 is a wasteful number, since it uses less digits than its factorization.

388372140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809 (or 791 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 388372140 is about 19707.1596126890. The cubic root of 388372140 is about 729.5964116787.

The spelling of 388372140 in words is "three hundred eighty-eight million, three hundred seventy-two thousand, one hundred forty".