1378232431 has 8 divisors (see below), whose sum is σ = 1484510720. Its totient is φ = 1275328152.

The previous prime is 1378232423. The next prime is 1378232437. The reversal of 1378232431 is 1342328731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1378232431 - 2³ = 1378232423 is a prime.

It is a super-2 number, since 2×1378232431² = 3799049267720339522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378232437) 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, 842655 + ... + 844288.

It is an arithmetic number, because the mean of its divisors is an integer number (185563840).

Almost surely, 2^1378232431 is an apocalyptic number.

1378232431 is a deficient number, since it is larger than the sum of its proper divisors (106278289).

1378232431 is a wasteful number, since it uses less digits than its factorization.

1378232431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687005.

The product of its digits is 24192, while the sum is 34.

The square root of 1378232431 is about 37124.5529400692. The cubic root of 1378232431 is about 1112.8607405817.

The spelling of 1378232431 in words is "one billion, three hundred seventy-eight million, two hundred thirty-two thousand, four hundred thirty-one".