3581940 has 24 divisors (see below), whose sum is σ = 10029600. Its totient is φ = 955168.

The previous prime is 3581927. The next prime is 3581953. The reversal of 3581940 is 491853.

It is an interprime number because it is at equal distance from previous prime (3581927) and next prime (3581953).

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 = 3581898 and 3581907.

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, 29790 + ... + 29909.

It is an arithmetic number, because the mean of its divisors is an integer number (417900).

Almost surely, 2^3581940 is an apocalyptic number.

3581940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3581940 is an abundant number, since it is smaller than the sum of its proper divisors (6447660).

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

3581940 is a wasteful number, since it uses less digits than its factorization.

3581940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59711 (or 59709 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 3581940 is about 1892.6013843385. The cubic root of 3581940 is about 153.0051687775.

The spelling of 3581940 in words is "three million, five hundred eighty-one thousand, nine hundred forty".