381215835 has 288 divisors, whose sum is σ = 961320960. Its totient is φ = 141523200.

The previous prime is 381215831. The next prime is 381215839. The reversal of 381215835 is 538512183.

It is an interprime number because it is at equal distance from previous prime (381215831) and next prime (381215839).

It is not a de Polignac number, because 381215835 - 2² = 381215831 is a prime.

Its product of digits (28800) is a multiple of the sum of its prime factors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 381215835.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381215831) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 12297270 + ... + 12297300.

It is an arithmetic number, because the mean of its divisors is an integer number (3337920).

Almost surely, 2^381215835 is an apocalyptic number.

381215835 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

381215835 is an abundant number, since it is smaller than the sum of its proper divisors (580105125).

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

381215835 is a wasteful number, since it uses less digits than its factorization.

381215835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 70 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 381215835 is about 19524.7492941651. The cubic root of 381215835 is about 725.0873204377.

It can be divided in two parts, 38121 and 5835, that added together give a triangular number (43956 = T₂₉₆).

The spelling of 381215835 in words is "three hundred eighty-one million, two hundred fifteen thousand, eight hundred thirty-five".