1390842436 has 27 divisors (see below), whose sum is σ = 2524725021. Its totient is φ = 670396944.

The previous prime is 1390842421. The next prime is 1390842449. The reversal of 1390842436 is 6342480931.

It is a happy number.

The square root of 1390842436 is 37294.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 729324036 + 661518400 = 27006^2 + 25720^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2162731 + ... + 2163373.

Almost surely, 2^1390842436 is an apocalyptic number.

1390842436 is the 37294-th square number.

It is an amenable number.

1390842436 is a deficient number, since it is larger than the sum of its proper divisors (1133882585).

1390842436 is an frugal number, since it uses more digits than its factorization.

1390842436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The cubic root of 1390842436 is about 1116.2444459244.

The spelling of 1390842436 in words is "one billion, three hundred ninety million, eight hundred forty-two thousand, four hundred thirty-six".