1641432390 has 32 divisors (see below), whose sum is σ = 4242472416. Its totient is φ = 404044800.

The previous prime is 1641432389. The next prime is 1641432391. The reversal of 1641432390 is 932341461.

It is an interprime number because it is at equal distance from previous prime (1641432389) and next prime (1641432391).

It is a super-2 number, since 2×1641432390² = 5388600581882224200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641432391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2104011 + ... + 2104790.

It is an arithmetic number, because the mean of its divisors is an integer number (132577263).

Almost surely, 2^1641432390 is an apocalyptic number.

1641432390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1641432390 is an abundant number, since it is smaller than the sum of its proper divisors (2601040026).

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

1641432390 is a wasteful number, since it uses less digits than its factorization.

1641432390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208824.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 1641432390 is about 40514.5947776847. The cubic root of 1641432390 is about 1179.6169373282.

The spelling of 1641432390 in words is "one billion, six hundred forty-one million, four hundred thirty-two thousand, three hundred ninety".