45171640 has 32 divisors (see below), whose sum is σ = 102390480. Its totient is φ = 17934592.

The previous prime is 45171617. The next prime is 45171667. The reversal of 45171640 is 4617154.

It is a junction number, because it is equal to n+sod(n) for n = 45171599 and 45171608.

It is a congruent number.

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, 1359 + ... + 9601.

Almost surely, 2^45171640 is an apocalyptic number.

45171640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45171640 is an abundant number, since it is smaller than the sum of its proper divisors (57218840).

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

45171640 is a wasteful number, since it uses less digits than its factorization.

45171640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8391 (or 8387 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 45171640 is about 6720.9850468514. The cubic root of 45171640 is about 356.1409827502.

Adding to 45171640 its reverse (4617154), we get a palindrome (49788794).

The spelling of 45171640 in words is "forty-five million, one hundred seventy-one thousand, six hundred forty".