45471440 has 40 divisors (see below), whose sum is σ = 120825600. Its totient is φ = 15590016.

The previous prime is 45471407. The next prime is 45471443. The reversal of 45471440 is 4417454.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45471443) 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, 40040 + ... + 41159.

It is an arithmetic number, because the mean of its divisors is an integer number (3020640).

Almost surely, 2^45471440 is an apocalyptic number.

45471440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45471440 is an abundant number, since it is smaller than the sum of its proper divisors (75354160).

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

45471440 is a wasteful number, since it uses less digits than its factorization.

45471440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81219 (or 81213 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 45471440 is about 6743.2514412559. The cubic root of 45471440 is about 356.9271376905.

Adding to 45471440 its reverse (4417454), we get a palindrome (49888894).

The spelling of 45471440 in words is "forty-five million, four hundred seventy-one thousand, four hundred forty".