45991648 has 12 divisors (see below), whose sum is σ = 90546120. Its totient is φ = 22995808.

The previous prime is 45991643. The next prime is 45991657. The reversal of 45991648 is 84619954.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 45991598 and 45991607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45991643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 718588 + ... + 718651.

It is an arithmetic number, because the mean of its divisors is an integer number (7545510).

Almost surely, 2^45991648 is an apocalyptic number.

It is an amenable number.

45991648 is a deficient number, since it is larger than the sum of its proper divisors (44554472).

45991648 is a wasteful number, since it uses less digits than its factorization.

45991648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437249 (or 1437241 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The square root of 45991648 is about 6781.7142375656. The cubic root of 45991648 is about 358.2831005602.

The spelling of 45991648 in words is "forty-five million, nine hundred ninety-one thousand, six hundred forty-eight".