1047640 has 32 divisors (see below), whose sum is σ = 2572560. Its totient is φ = 380800.

The previous prime is 1047589. The next prime is 1047647. The reversal of 1047640 is 467401.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1047647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 751 + ... + 1630.

2^1047640 is an apocalyptic number.

1047640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1047640 is an abundant number, since it is smaller than the sum of its proper divisors (1524920).

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

1047640 is a wasteful number, since it uses less digits than its factorization.

1047640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403 (or 2399 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 1047640 is about 1023.5428667135. The cubic root of 1047640 is about 101.5634294984.

It can be divided in two parts, 104 and 7640, that added together give a square (7744 = 88²).

The spelling of 1047640 in words is "one million, forty-seven thousand, six hundred forty".