1382440357 has 4 divisors (see below), whose sum is σ = 1463760396. Its totient is φ = 1301120320.

The previous prime is 1382440349. The next prime is 1382440363. The reversal of 1382440357 is 7530442831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 397045476 + 985394881 = 19926^2 + 31391^2 .

It is a cyclic number.

It is not a de Polignac number, because 1382440357 - 2³ = 1382440349 is a prime.

It is a super-2 number, since 2×1382440357² = 3822282681324574898, 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 (1382440457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40659994 + ... + 40660027.

It is an arithmetic number, because the mean of its divisors is an integer number (365940099).

Almost surely, 2^1382440357 is an apocalyptic number.

1382440357 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1382440357 is a deficient number, since it is larger than the sum of its proper divisors (81320039).

1382440357 is an equidigital number, since it uses as much as digits as its factorization.

1382440357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81320038.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 1382440357 is about 37181.1828348696. The cubic root of 1382440357 is about 1113.9921602741.

The spelling of 1382440357 in words is "one billion, three hundred eighty-two million, four hundred forty thousand, three hundred fifty-seven".