1961788 has 24 divisors (see below), whose sum is σ = 3669120. Its totient is φ = 915120.

The previous prime is 1961767. The next prime is 1961797. The reversal of 1961788 is 8871691.

It is a super-2 number, since 2×1961788² = 7697224313888, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1961788.

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, 6153 + ... + 6463.

It is an arithmetic number, because the mean of its divisors is an integer number (152880).

2^1961788 is an apocalyptic number.

It is an amenable number.

1961788 is a deficient number, since it is larger than the sum of its proper divisors (1707332).

1961788 is a wasteful number, since it uses less digits than its factorization.

1961788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 415 counting only the distinct ones).

The product of its digits is 24192, while the sum is 40.

The square root of 1961788 is about 1400.6384258616. The cubic root of 1961788 is about 125.1845380981.

Subtracting 1961788 from its reverse (8871691), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 1961788 in words is "one million, nine hundred sixty-one thousand, seven hundred eighty-eight".