3890642 has 8 divisors (see below), whose sum is σ = 6669696. Its totient is φ = 1667412.

The previous prime is 3890639. The next prime is 3890651. The reversal of 3890642 is 2460983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3890599 and 3890608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138938 + ... + 138965.

It is an arithmetic number, because the mean of its divisors is an integer number (833712).

Almost surely, 2^3890642 is an apocalyptic number.

3890642 is a deficient number, since it is larger than the sum of its proper divisors (2779054).

3890642 is a wasteful number, since it uses less digits than its factorization.

3890642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277912.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 3890642 is about 1972.4710390776. The cubic root of 3890642 is about 157.2800928655.

It can be divided in two parts, 389064 and 2, that multiplied together give a triangular number (778128 = T₁₂₄₇).

The spelling of 3890642 in words is "three million, eight hundred ninety thousand, six hundred forty-two".