1640348 has 6 divisors (see below), whose sum is σ = 2870616. Its totient is φ = 820172.

The previous prime is 1640333. The next prime is 1640393. The reversal of 1640348 is 8430461.

It is a super-2 number, since 2×1640348² = 5381483122208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205040 + ... + 205047.

It is an arithmetic number, because the mean of its divisors is an integer number (478436).

2^1640348 is an apocalyptic number.

It is an amenable number.

1640348 is a deficient number, since it is larger than the sum of its proper divisors (1230268).

1640348 is a wasteful number, since it uses less digits than its factorization.

1640348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410091 (or 410089 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1640348 is about 1280.7607114524. The cubic root of 1640348 is about 117.9357114138.

The spelling of 1640348 in words is "one million, six hundred forty thousand, three hundred forty-eight".