381699648 has 224 divisors, whose sum is σ = 1255288320. Its totient is φ = 112734720.

The previous prime is 381699641. The next prime is 381699667. The reversal of 381699648 is 846996183.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 381699594 and 381699603.

It is not an unprimeable number, because it can be changed into a prime (381699641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 817111 + ... + 817577.

Almost surely, 2^381699648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381699648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (627644160).

381699648 is an abundant number, since it is smaller than the sum of its proper divisors (873588672).

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

381699648 is a wasteful number, since it uses less digits than its factorization.

381699648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 526 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 381699648 is about 19537.1351021587. The cubic root of 381699648 is about 725.3939344671.

The spelling of 381699648 in words is "three hundred eighty-one million, six hundred ninety-nine thousand, six hundred forty-eight".