1538490 has 16 divisors (see below), whose sum is σ = 3692448. Its totient is φ = 410256.

The previous prime is 1538473. The next prime is 1538491. The reversal of 1538490 is 948351.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 51283 = 1538490 / (1 + 5 + 3 + 8 + 4 + 9 + 0).

It is not an unprimeable number, because it can be changed into a prime (1538491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25612 + ... + 25671.

It is an arithmetic number, because the mean of its divisors is an integer number (230778).

2^1538490 is an apocalyptic number.

1538490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1538490 is an abundant number, since it is smaller than the sum of its proper divisors (2153958).

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

1538490 is a wasteful number, since it uses less digits than its factorization.

1538490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51293.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1538490 is about 1240.3588190520. The cubic root of 1538490 is about 115.4422792117.

The spelling of 1538490 in words is "one million, five hundred thirty-eight thousand, four hundred ninety".