1401990 has 32 divisors (see below), whose sum is σ = 3564000. Its totient is φ = 351744.

The previous prime is 1401989. The next prime is 1402003. The reversal of 1401990 is 991041.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1401990.

It is a congruent 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, 865 + ... + 1884.

It is an arithmetic number, because the mean of its divisors is an integer number (111375).

2^1401990 is an apocalyptic number.

1401990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1401990 is an abundant number, since it is smaller than the sum of its proper divisors (2162010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1401990 is a wasteful number, since it uses less digits than its factorization.

1401990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1401990 is about 1184.0565864856. The cubic root of 1401990 is about 111.9218736614.

The spelling of 1401990 in words is "one million, four hundred one thousand, nine hundred ninety".