1354431220 has 24 divisors (see below), whose sum is σ = 2852517024. Its totient is φ = 540208416.

The previous prime is 1354431203. The next prime is 1354431223. The reversal of 1354431220 is 221344531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1354431223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90642 + ... + 104521.

It is an arithmetic number, because the mean of its divisors is an integer number (118854876).

Almost surely, 2^1354431220 is an apocalyptic number.

1354431220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1354431220 is an abundant number, since it is smaller than the sum of its proper divisors (1498085804).

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

1354431220 is a wasteful number, since it uses less digits than its factorization.

1354431220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195519 (or 195517 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1354431220 is about 36802.5980061191. The cubic root of 1354431220 is about 1106.4173699759.

Adding to 1354431220 its reverse (221344531), we get a palindrome (1575775751).

The spelling of 1354431220 in words is "one billion, three hundred fifty-four million, four hundred thirty-one thousand, two hundred twenty".