1401864790 has 16 divisors (see below), whose sum is σ = 2564724240. Its totient is φ = 551553120.

The previous prime is 1401864757. The next prime is 1401864809. The reversal of 1401864790 is 974681041.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1148460 + ... + 1149679.

It is an arithmetic number, because the mean of its divisors is an integer number (160295265).

Almost surely, 2^1401864790 is an apocalyptic number.

1401864790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1401864790 is a deficient number, since it is larger than the sum of its proper divisors (1162859450).

1401864790 is a wasteful number, since it uses less digits than its factorization.

1401864790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298207.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 1401864790 is about 37441.4848797427. The cubic root of 1401864790 is about 1119.1854169397.

The spelling of 1401864790 in words is "one billion, four hundred one million, eight hundred sixty-four thousand, seven hundred ninety".