1631394 has 16 divisors (see below), whose sum is σ = 3625440. Its totient is φ = 543780.

The previous prime is 1631369. The next prime is 1631407. The reversal of 1631394 is 4931361.

It is a super-2 number, since 2×1631394² = 5322892766472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15052 + ... + 15159.

It is an arithmetic number, because the mean of its divisors is an integer number (226590).

2^1631394 is an apocalyptic number.

1631394 is an abundant number, since it is smaller than the sum of its proper divisors (1994046).

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

1631394 is a wasteful number, since it uses less digits than its factorization.

1631394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30222 (or 30216 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 1631394 is about 1277.2603493415. The cubic root of 1631394 is about 117.7207319037.

It can be divided in two parts, 1631 and 394, that added together give a square (2025 = 45²).

The spelling of 1631394 in words is "one million, six hundred thirty-one thousand, three hundred ninety-four".