1646938490 has 16 divisors (see below), whose sum is σ = 2965081248. Its totient is φ = 658643856.

The previous prime is 1646938477. The next prime is 1646938499. The reversal of 1646938490 is 948396461.

It is not an unprimeable number, because it can be changed into a prime (1646938499) 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, 48269 + ... + 74991.

It is an arithmetic number, because the mean of its divisors is an integer number (185317578).

Almost surely, 2^1646938490 is an apocalyptic number.

1646938490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1646938490 is a deficient number, since it is larger than the sum of its proper divisors (1318142758).

1646938490 is a wasteful number, since it uses less digits than its factorization.

1646938490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32893.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The square root of 1646938490 is about 40582.4899433241. The cubic root of 1646938490 is about 1180.9344532333.

The spelling of 1646938490 in words is "one billion, six hundred forty-six million, nine hundred thirty-eight thousand, four hundred ninety".