1400490 has 160 divisors (see below), whose sum is σ = 4878720. Its totient is φ = 279936.

The previous prime is 1400489. The next prime is 1400507. The reversal of 1400490 is 940041.

1400490 = 210² + 211² + ... + 237².

It is a super-2 number, since 2×1400490² = 3922744480200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 73701 + ... + 73719.

It is an arithmetic number, because the mean of its divisors is an integer number (30492).

2^1400490 is an apocalyptic number.

1400490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1400490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2439360).

1400490 is an abundant number, since it is smaller than the sum of its proper divisors (3478230).

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

1400490 is a wasteful number, since it uses less digits than its factorization.

1400490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1400490 is about 1183.4230012975. The cubic root of 1400490 is about 111.8819440568.

The spelling of 1400490 in words is "one million, four hundred thousand, four hundred ninety".