387842040 has 128 divisors (see below), whose sum is σ = 1297396800. Its totient is φ = 103057920.

The previous prime is 387841999. The next prime is 387842051. The reversal of 387842040 is 40248783.

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 = 387841986 and 387842004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 454254 + ... + 455106.

Almost surely, 2^387842040 is an apocalyptic number.

387842040 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 387842040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (648698400).

387842040 is an abundant number, since it is smaller than the sum of its proper divisors (909554760).

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

387842040 is a wasteful number, since it uses less digits than its factorization.

387842040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 387842040 is about 19693.7055934123. The cubic root of 387842040 is about 729.2643116836.

The spelling of 387842040 in words is "three hundred eighty-seven million, eight hundred forty-two thousand, forty".