47409240 has 64 divisors (see below), whose sum is σ = 142702560. Its totient is φ = 12600320.

The previous prime is 47409211. The next prime is 47409251. The reversal of 47409240 is 4290474.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 47409198 and 47409207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54892 + ... + 55748.

Almost surely, 2^47409240 is an apocalyptic number.

47409240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47409240 is an abundant number, since it is smaller than the sum of its proper divisors (95293320).

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

47409240 is a wasteful number, since it uses less digits than its factorization.

47409240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 47409240 is about 6885.4368053160. The cubic root of 47409240 is about 361.9270123395.

The spelling of 47409240 in words is "forty-seven million, four hundred nine thousand, two hundred forty".