1438890370 has 32 divisors (see below), whose sum is σ = 2758831488. Its totient is φ = 538445568.

The previous prime is 1438890317. The next prime is 1438890391. The reversal of 1438890370 is 730988341.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3049 + ... + 53731.

It is an arithmetic number, because the mean of its divisors is an integer number (86213484).

Almost surely, 2^1438890370 is an apocalyptic number.

1438890370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1438890370 is a deficient number, since it is larger than the sum of its proper divisors (1319941118).

1438890370 is a wasteful number, since it uses less digits than its factorization.

1438890370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50874.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 1438890370 is about 37932.7084453510. The cubic root of 1438890370 is about 1128.9531040639.

The spelling of 1438890370 in words is "one billion, four hundred thirty-eight million, eight hundred ninety thousand, three hundred seventy".