1490797440 has 768 divisors, whose sum is σ = 6251212800. Its totient is φ = 334540800.

The previous prime is 1490797411. The next prime is 1490797447. The reversal of 1490797440 is 447970941.

It is a super-2 number, since 2×1490797440² = 4444954014221107200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1490797447) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 48090225 + ... + 48090255.

It is an arithmetic number, because the mean of its divisors is an integer number (8139600).

Almost surely, 2^1490797440 is an apocalyptic number.

1490797440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1490797440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3125606400).

1490797440 is an abundant number, since it is smaller than the sum of its proper divisors (4760415360).

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

1490797440 is a wasteful number, since it uses less digits than its factorization.

1490797440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 1490797440 is about 38610.8461445745. The cubic root of 1490797440 is about 1142.3684829946.

The spelling of 1490797440 in words is "one billion, four hundred ninety million, seven hundred ninety-seven thousand, four hundred forty".