381429550 has 12 divisors (see below), whose sum is σ = 709459056. Its totient is φ = 152571800.

The previous prime is 381429467. The next prime is 381429563. The reversal of 381429550 is 55924183.

It is a super-2 number, since 2×381429550² = 290977003226405000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3814246 + ... + 3814345.

It is an arithmetic number, because the mean of its divisors is an integer number (59121588).

Almost surely, 2^381429550 is an apocalyptic number.

381429550 is a deficient number, since it is larger than the sum of its proper divisors (328029506).

381429550 is a wasteful number, since it uses less digits than its factorization.

381429550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7628603 (or 7628598 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 381429550 is about 19530.2214529175. The cubic root of 381429550 is about 725.2227932010. Note that the first 3 decimals are identical.

The spelling of 381429550 in words is "three hundred eighty-one million, four hundred twenty-nine thousand, five hundred fifty".