1390226450 has 18 divisors (see below), whose sum is σ = 2586311679. Its totient is φ = 555985120.

The previous prime is 1390226449. The next prime is 1390226491. The reversal of 1390226450 is 546220931.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 492085489 + 898140961 = 22183^2 + 29969^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=26365.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 261014 + ... + 266286.

Almost surely, 2^1390226450 is an apocalyptic number.

1390226450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1390226450 is a deficient number, since it is larger than the sum of its proper divisors (1196085229).

1390226450 is an frugal number, since it uses more digits than its factorization.

1390226450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10558 (or 5280 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1390226450 is about 37285.7405719667. The cubic root of 1390226450 is about 1116.0796315484.

Multiplying 1390226450 by its sum of digits (32), we get a square (44487246400 = 210920²).

The spelling of 1390226450 in words is "one billion, three hundred ninety million, two hundred twenty-six thousand, four hundred fifty".