47554640 has 40 divisors (see below), whose sum is σ = 126360960. Its totient is φ = 16304256.

The previous prime is 47554579. The next prime is 47554643. The reversal of 47554640 is 4645574.

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

It is a super-2 number, since 2×47554640² = 4522887571059200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 47554640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47554643) 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, 41900 + ... + 43019.

It is an arithmetic number, because the mean of its divisors is an integer number (3159024).

Almost surely, 2^47554640 is an apocalyptic number.

47554640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47554640 is an abundant number, since it is smaller than the sum of its proper divisors (78806320).

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

47554640 is a wasteful number, since it uses less digits than its factorization.

47554640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84939 (or 84933 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 47554640 is about 6895.9872389673. The cubic root of 47554640 is about 362.2966342468.

The spelling of 47554640 in words is "forty-seven million, five hundred fifty-four thousand, six hundred forty".